The evolution of man : a popular exposition of the principal points of human ontogeny and phylogeny . Fig. 294. Fig. 293.—Nerve-muscle tissue. Three cells from Hydra : n, outer,nervous ; m, inner, muscular part of the cells. (After Kleinenberg.) Fig. 294.—Nerve-tissue (from a spinal nerve knot): a, anterior, b,posterior root of the spinal nerve ; d, e, fibrous nerve-stem; /, g, h, i, nervecells in ganglion (/, unipolar, g, h, bipolar cells); fc, I, nerve fibres. (AfterFrey.) Fig. 295.—Muscle-tissue. Three pieces of striped muscle fibre (a). In-terfibrous fat-cells (b). (After Frey.) For while
The evolution of man : a popular exposition of the principal points of human ontogeny and phylogeny . Fig. 294. Fig. 293.—Nerve-muscle tissue. Three cells from Hydra : n, outer,nervous ; m, inner, muscular part of the cells. (After Kleinenberg.) Fig. 294.—Nerve-tissue (from a spinal nerve knot): a, anterior, b,posterior root of the spinal nerve ; d, e, fibrous nerve-stem; /, g, h, i, nervecells in ganglion (/, unipolar, g, h, bipolar cells); fc, I, nerve fibres. (AfterFrey.) Fig. 295.—Muscle-tissue. Three pieces of striped muscle fibre (a). In-terfibrous fat-cells (b). (After Frey.) For while in the lowest Plant Animals the body consistsmerely of covering tissue, and while in many other TISSUES. 365 Zoophytes a middle layer of connective tissue developsbetween the two primary germ-layers, it is only in themost highly developed Plant Animals that muscle and nervetissue is formed. As has already been said, the latter firstappeared as a common nerve and muscle tissue (neuro-musculum, Fig. 293 ; cf. p. 358). It was only afterwardsthat the muscle-tissue (Fig. 295) separated from the
Size: 1121px × 2230px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1800, bookdecade1870, booksubjectembryologyhuman
